Improvement in paper-cutting machines



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l Paper-Cuttig Machines.

Nol 132,327I Paented0c.15,18-72.

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UNITED STATES PATENT OFFICE.

EDWIN R. SHERIDAN AND THEODORE W. SPIERIDAN, OF NEW YORK, N. Y.

IMPROVEMENT IN PAPER-CUTTING MACHINES.

Specification fcrmin g part of Letters Patent No. 132,327, dated October15,1872.

proved machine; Fig. 2, Sheet 1, is an end view ofthe same, partly insection, through the.

line me, Fig. 1 Fig. 3, Sheet 2, is a top view of the same, partly inhorizontal section, through the line y y, Fig. 2 5 Fig. 4, Sheet 2, viewof the shifting-block.

Similar letters vof reference indicate correspondin g parts.

Our invention has for its object to improve the construction ofpaper-cuttin g machines, so as to make them more convenient in use andmore eifective and reliable in operation; and it consists in theconstruction and combination of various parts of the machine, ashereinafter more fully described.

A represents the frame work of the machine. B is the table upon whichthe paper is arranged to be cut. Gis the guide. D is is a detail theadjustable. gage. E is the compressing or clamping bar, which is raisedandlowered by racks and pinions placed beneath the table B, and operatedby an endless screw, F, in the ordinary manner. G is the bar to whichthe knife H is secured, which bar moves up and down in slots in theframe A, and is hung from the upper part of said frame by bars or links,I, so'as to move up and down in a horizontal line. The knife-bar andknife G H are moved up and down by tlie movements of the lever J,

- which is connected with said knife-bar G by an adjustableconnecting-rod, K. The lever J is pivoted to theframe A, and works in aguideslot in the lower part of the said frame A. To

the end of the lever J is attached the lower end of a chain L, the upperend of which is attached to the shaft M, or to a drum placed upon andsecured to said shaft. In the shaft or drum M is formed a spiral grooveinto which the chain L is Wound as the shaft or drum M is revolved inone direction, so as to raise the lever J and draw the knife-bar andknife G H down upon the paper to make a cut. The spiral groove in theshaft or drum M keeps the coils of the chain parallel with each other,and thus prevents the coils overlapping and the chain from kinking whilebeing wound and unwound, so that the movement of the knife may be steadyand uniform. The journals ofthe shaft or drum-M revolve in bearingsattached to the frame A, and to said shaft or drum is attached agear-wheel, N, the teeth of which mesh into the teeth of the smallergear-Wheel O, Which runs loosely upon the shaft P. The shaft P revolvesin bearings attached to the frame A, and to its outer end is attached acrank iiywheel, Q, and to it may also be attached a drivin g-pulley whenthe machine is to be driven by power. Upon the inner part of the shaft Pis placed a clutch, R, which is connected With the said shaft P by atongue and groove or other convenient means, so that it may be carriedaround by and with the said shaft P in its revolution, While being freeto slide longitudinally upon it. The clutch R is grooved to receive theforked end of the lever S, by which itis moved outward to clutch thegearwheel O, and carry it with the shaftP in its revolution, and inwardto release said gearwheel O and allow it to run free uponl the saidshaft P. The lever S is pivoted toa bracket attached to the fra-me A,and itsfree end passes out beneath the guide-barT and' above theguide-block U into such a position that it may be convenientlyT reachedand opera-ted by the workman. The lever S is held securely in eitherposition by a double-inclined block, V, placed in a recess in the top ofthe block U, and which is held up against the said lever S by a smallspring placed beneath it in the said recess. W is a block moving up andudown loosely in grooves or Ways in the lframeA and guide-block U, andwhich is so formed that as the lever J approaches the upper limit of itsstroke it may strike against and raise the said block W. The upper end of the trip-block W is inclined so that, as it is raised by the lever J,it may move the free end of the lever S outward, and thus operate' theclutch R and release the wheel O, which allows the lever J to descend byits own weight, raising the knife-bar and knife ready to make anotherout. The lever J should have an adjustable Weight j attached to it, toenable its rapidity of descent to be regulated, as desired. As the leverJ approaches the limit of its downward movement it strikes a spring, X,attached to the loWer part of the lever Y, which checks it, preventsrebound, and at the saine time moves the said lever Y. The tension ofthe spring X. is regulated by a set-screw, as shown in Fig. 2. The leverY is pivoted to the frame A, or to a bracket attached to said frame, andits upper end is connected With one end of the brake-band or strap Z,which passes over the hub of the gear-Wheel 0, or a brake-Wheel attachedto said gear-Wheel, so that the lever J, as it reaches the lowest pointof its descent, may apply the brake and stop the movement of thegear-Wheels, until motion is again given by throwing the clutch intogear by operating the lever S.

Having thus described our invention, We claim as new, and desire tosecure by Letters Patent- 1. The inclined trip-block W, in combinationwith the clutch-lever S, and the lever J that operates the knife of apapercutting;` maframe, of a train of operative mechanism, consisting ofthe rod K, lever J, chain L, and spirally-grooved drum M, arranged asdescribed.

EDWIN R. SHERIDAN. THEODORE WV. SHERIDAN.

Witnesses J AMES T. GRAHAM, T. B. MosHER.

